<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container {
            width: 80%;
            margin: 0 auto;
            background-color: cadetblue;
        }

        .container::after {
            content: '';
            display: block;
            clear: both;
        }

        .left {
            width: 300px;
            background-color: tomato;
            float: left;
            margin-right: 20px;
        }

        .right {
            width: 300px;
            background-color: tomato;
            float: right;
            margin-left: 20px;
        }

        .main {
            background-color: bisque;
            /* height: 600px; */
            /* overflow: hidden; */
            display: flow-root;
            /* position: absolute; */
        }
    </style>
</head>

<body>
    <div class="container">
        <aside class="left">Lorem ipsum dolor sit amet consectetur adipisicing elit. Aspernatur illo assumenda nemo
            quibusdam et. Blanditiis perspiciatis asperiores ducimus sapiente doloribus, assumenda alias iste expedita
            architecto earum, officiis libero voluptatem possimus.</aside>
        <aside class="right">Lorem ipsum dolor, sit amet consectetur adipisicing elit. Ipsam ratione officia ad quidem?
            Nulla dolore ut amet aspernatur, error autem! Neque tenetur modi ipsam molestiae debitis. Aperiam fugit ipsa
            quisquam?</aside>
        <div class="main">Lorem ipsum dolor, sit amet consectetur adipisicing elit. Ipsam ratione officia ad quidem?
            Nulla dolore ut amet aspernatur, error autem! Neque tenetur modi ipsam molestiae debitis. Aperiam fugit ipsa
            quisquam?</div>

    </div>
</body>

</html>